<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        body {
            background-color: #000;
        }

        .container {
            background-color: #000;
            text-align: center;
            margin-top: 150px;
            filter: contrast(100);
        }

        .text-1 {
            font-size: 100px;
            font-weight: bold;
            color: #fff;
            animation: expand 2s linear forwards;
        }

        .text-2 {
            font-size: 100px;
            font-weight: bold;
            color: orchid;
            animation: expand 2s linear forwards;
        }

        @keyframes expand {
            from {
                letter-spacing: -100px;
                filter: blur(5px);
            }

            to {
                letter-spacing: 0px;
                filter: blur(0px);
            }
        }
    </style>
</head>

<body>
    <div class="container">
        <span class="text-1">千山万水 千山万水</span>
    </div>
    <!-- 和整体背景色有关系 -->
    <div class="container">
        <span class="text-2">千山万水 千山万水</span>
    </div>
</body>

</html>